write a python code for writing the addition testcase of asus calculator of the desired capabilities by using appiumcode

desired_caps['platformName'] = 'Android

desired_caps['deviceName'] = 'Pixel XL API 33'

desired_caps['appPackage'] = 'com.asus.calculator'

desired_caps['appActivity'] = 'com.asus.calculator.Calculator'. If the testcase gets failed the output of testcase errors gets into the log.txt file and the the output of each and every error should change into red colour and bold in the colored_logfile write a detailed code for that